摘要：

ShenzhenZhongshan Rivercrossing Link is the first super integrated project in the world that consists of four different types of structures, i.e. ultralong and wide immersed tunnels, superlarge span seacrossing bridges, deepwater artificial islands and undersea interchanges. The rivercrossing is designed for twoway and 8lane as per highway technical standards. Based on project characteristics and its technical difficulties, engineering solutions and the associated technology innovations have been listed as follows: (1) Proposed a design concept of standardization, industrialization, intelligence and project integration, and completed the study of overall design of ShenzhenZhongshan RiverCrossing Link. An immersed tunnel with a combined steelshell and concrete composite structure is designed and the width of tunnel elements is from 46 to 55.5 m; Lingdingyang Bridge has been designed as a suspension bridge with a 1 666 m main span and two 270 m high main bridge towers. For West Island, a temporary enclosure caisson structure made of ultralarge steel cylinders with a diameter of 28 m is designed to achieve a rapid artificial island formation. (2) Summarized the design and construction solutions related to combined steelshell and concrete structural immersed tunnel, the mix design, batching and concrete casting methods of highstrength selfcompacting fluidized concrete, concrete quality check and inspection, design and construction of deep cement mixed (DCM) pile foundation for immersed tunnels, design and construction of largescale undersea dimensional transport interchange, flutter and wind stability design for superlarge span suspension bridge with monobox girders, and key techniques related to design and construction of offshore anchorage in deep sea. Furthermore, an equipment is developed and innovated for not only transport, also for installation of immersed tunnel elements to ensure the implementation of the project in an effective and economical way.

中图分类号: 

• U 45